Configuring IP Routing 14-15
Some changes to IP Static Routes and IP Interfaces (described earlier)
require an extra step to update the SmartSwitch 1800 software. Changing
certain parameters will generate th e message: Dynamic Routing Parameters
have changed. ............. Do you wish to update them at this time Y/N (N)? This
must be done, but if you are making several changes to IP Interfaces and
Static Routes, you can save time by specifying N for each change until the
final on e . Entering Y after the final change will update all changes made to
both IP Interfaces and Static Routes.
If you forg et to spec ify Y af ter the last change, you can still update th e FRM
via On-line U pdate Dynamic Routing Parameters, [G] at the
IP/LLC2/BRIDGE/IPX Interfaces Configuration menu (or [A], [A], [E], [G]
from the Main Menu).
IP Routing Parameters
Routeris the IP address of a router that can reach the route destination.
Metric Count
is the number of " hops" (network gateways in the overall path o ver the internet) f rom
the source to the destination.
Route Type:
Network defines a route for a network.
Host defines a route for a specific host.
Default defines a route that will be used if no other route is found.
Route D esti natio n
is the IP address of the destination for host routes.
Dest inatio n M ask
is the mask used for network routes. It is used only during routing, to identify the
portion of the address associated with the network.
When an IP datagram is received, the software "masks" off this portion of the overall
address and searches for a match to the remaining address in the node's IP routing
table. If there is no match, then the destination mask is checked. If no match is found
here either, the default route (i f configured) will be used. If the default r oute is not con-
figured, the data gram will be d iscarded, and an e rror message will be sent to the
source.
Table 14-5 IP Routing Parameters
Parameter Valid Values Default Value
Router valid IP a ddres s 255.255.2 55.255
Metric Count 1–255 1
Route Type Network, Host, Default Network
Route De stinat ion valid I P addr ess o r 0 0.0.0.0
Destinat ion Mas k va lid IP addre ss 255.255.2 55.25 5